How To Fix CNV455 - Generation cannot run in more than one client at a time

CNV455 - Overview

• Message type: E = Error

• Message class: CNV - Conversion: Messages for Conversion Services (CNCC)

• Message number: 455

• Message text: Generation cannot run in more than one client at a time

What causes this issue?

The generation process is active in other clients.

System Response

Program is canceled.

How to fix this error?

Wait until the generation in the other clients is completed, then
restart this program.

Error message extract from SAP system. Copyright SAP SE.

CNV455 - Details

• The SAP error message CNV455 indicates that a specific process or job cannot be executed in more than one client at the same time. This is often encountered during data migration or conversion processes, particularly when using SAP's tools for data migration, such as the SAP S/4HANA Migration Cockpit or other conversion tools.
  
  Cause:
  
  Concurrent Execution: The error typically arises when there are multiple sessions or jobs trying to execute the same migration or conversion process across different clients simultaneously.
  Locking Mechanism: SAP has a locking mechanism to prevent data inconsistencies and ensure that the migration process is not disrupted by concurrent operations.
  Client-Specific Data: The migration process may involve client-specific data, and running it in multiple clients at the same time could lead to conflicts or data integrity issues.
  
  
  Solution:
  
  Single Client Execution: Ensure that the migration or conversion job is only running in one client at a time. You may need to check other